Fastener



FIG. 1 is a side perspective view of a fastener;

FIG. 2 is a front side elevation view thereof;

FIG. 3 is a rear side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines in the drawings illustrate portions of the fastener that form no part of the claimed design. 

CLAIM The ornamental design for a fastener, as shown and described. 